Oh my goodness what happened to the weather I have even put the heating back on and I don't usually feel the cold.
So lets talk cutting mats! Over the years I have purchased quite a few and some have lasted longer than others. Your cutting mat does need a good clean every so often and the best way I found is to do this in the bath. Add some washing up liquid to warm water and leave to soak for about half an hour. Then give it a light brush over with a nail brush to get rid of anything that's built up in the cuts.
Never cut fleece, wadding, batting or anything that has very loose fibers with a rotary cutter on your cutting mat as the fibers go deep into the mat and its difficult to get them out.
I'm old school and still use inches, feet and yards, but I do have to occasionally convert to cm's and mm's, so the cutting mat I like is to use is the Ansio A1 double sided self healing 5 layer cutting mat with imperial and metric measurements. I will add the link below for you to take a look at.